Yet another homemade alloy/silver related post.
What can I say, homemade alloys are fun (when they Work) and I want a better sterling than traditional sterling.
My question is, would replacing a bit of the copper with zinc by alloying the sterling with yellow brass make it noticeably more resistant to tarnish and firestain? By melting the silver with 7.5% brass it would work out to 92.5% silver, 5.25% copper, 2.25% zinc. Is that enough zinc to provide any resistance to said firestain and tarnish?